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golang-demo's Issues

Error running in Docker

When i run from my local go distribution it is fine. (go build main.go; ./main)

But, when I run in docker using the docker command:

docker run -p 8080:8080 [image_id]

i get the below error:

2020/03/20 19:01:26 http: panic serving 172.17.0.1:52008: runtime error: invalid memory address or nil pointer dereference
goroutine 34 [running]:
net/http.(*conn).serve.func1(0xc0000c4f00)
	/usr/local/go/src/net/http/server.go:1772 +0x139
panic(0x78a1a0, 0xaec540)
	/usr/local/go/src/runtime/panic.go:973 +0x3e3
html/template.(*Template).escape(0x0, 0x0, 0x0)
	/usr/local/go/src/html/template/template.go:95 +0x3b
html/template.(*Template).Execute(0x0, 0x878340, 0xc000130000, 0x0, 0x0, 0x878480, 0xc00010c180)
	/usr/local/go/src/html/template/template.go:119 +0x2f
main.indexHandler(0x87dd20, 0xc000130000, 0xc00019e000)
	/go/src/golang-demo/main.go:33 +0xbf
net/http.HandlerFunc.ServeHTTP(0x80c430, 0x87dd20, 0xc000130000, 0xc00019e000)
	/usr/local/go/src/net/http/server.go:2012 +0x44
net/http.(*ServeMux).ServeHTTP(0xafc560, 0x87dd20, 0xc000130000, 0xc00019e000)
	/usr/local/go/src/net/http/server.go:2387 +0x1a5
net/http.serverHandler.ServeHTTP(0xc0000fa000, 0x87dd20, 0xc000130000, 0xc00019e000)
	/usr/local/go/src/net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc0000c4f00, 0x87e6a0, 0xc0000dc2c0)
	/usr/local/go/src/net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2933 +0x35c
2020/03/20 19:01:26 http: panic serving 172.17.0.1:52006: runtime error: invalid memory address or nil pointer dereference
goroutine 33 [running]:
net/http.(*conn).serve.func1(0xc0000c4e60)
	/usr/local/go/src/net/http/server.go:1772 +0x139
panic(0x78a1a0, 0xaec540)
	/usr/local/go/src/runtime/panic.go:973 +0x3e3
html/template.(*Template).escape(0x0, 0x0, 0x0)
	/usr/local/go/src/html/template/template.go:95 +0x3b
html/template.(*Template).Execute(0x0, 0x878340, 0xc0000fa0e0, 0x0, 0x0, 0x878480, 0xc000099260)
	/usr/local/go/src/html/template/template.go:119 +0x2f
main.indexHandler(0x87dd20, 0xc0000fa0e0, 0xc00011a000)
	/go/src/golang-demo/main.go:33 +0xbf
net/http.HandlerFunc.ServeHTTP(0x80c430, 0x87dd20, 0xc0000fa0e0, 0xc00011a000)
	/usr/local/go/src/net/http/server.go:2012 +0x44
net/http.(*ServeMux).ServeHTTP(0xafc560, 0x87dd20, 0xc0000fa0e0, 0xc00011a000)
	/usr/local/go/src/net/http/server.go:2387 +0x1a5
net/http.serverHandler.ServeHTTP(0xc0000fa000, 0x87dd20, 0xc0000fa0e0, 0xc00011a000)
	/usr/local/go/src/net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc0000c4e60, 0x87e6a0, 0xc000108080)
	/usr/local/go/src/net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2933 +0x35c
2020/03/20 19:01:26 http: panic serving 172.17.0.1:52010: runtime error: invalid memory address or nil pointer dereference
goroutine 19 [running]:
net/http.(*conn).serve.func1(0xc000110140)
	/usr/local/go/src/net/http/server.go:1772 +0x139
panic(0x78a1a0, 0xaec540)
	/usr/local/go/src/runtime/panic.go:973 +0x3e3
html/template.(*Template).escape(0x0, 0x0, 0x0)
	/usr/local/go/src/html/template/template.go:95 +0x3b
html/template.(*Template).Execute(0x0, 0x878340, 0xc0000fa1c0, 0x0, 0x0, 0x878480, 0xc000099350)
	/usr/local/go/src/html/template/template.go:119 +0x2f
main.indexHandler(0x87dd20, 0xc0000fa1c0, 0xc00011a100)
	/go/src/golang-demo/main.go:33 +0xbf
net/http.HandlerFunc.ServeHTTP(0x80c430, 0x87dd20, 0xc0000fa1c0, 0xc00011a100)
	/usr/local/go/src/net/http/server.go:2012 +0x44
net/http.(*ServeMux).ServeHTTP(0xafc560, 0x87dd20, 0xc0000fa1c0, 0xc00011a100)
	/usr/local/go/src/net/http/server.go:2387 +0x1a5
net/http.serverHandler.ServeHTTP(0xc0000fa000, 0x87dd20, 0xc0000fa1c0, 0xc00011a100)
	/usr/local/go/src/net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc000110140, 0x87e6a0, 0xc000108200)
	/usr/local/go/src/net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2933 +0x35c
2020/03/20 19:01:26 http: panic serving 172.17.0.1:52014: runtime error: invalid memory address or nil pointer dereference
goroutine 5 [running]:
net/http.(*conn).serve.func1(0xc000058000)
	/usr/local/go/src/net/http/server.go:1772 +0x139
panic(0x78a1a0, 0xaec540)
	/usr/local/go/src/runtime/panic.go:973 +0x3e3
html/template.(*Template).escape(0x0, 0x0, 0x0)
	/usr/local/go/src/html/template/template.go:95 +0x3b
html/template.(*Template).Execute(0x0, 0x878340, 0xc0000fa2a0, 0x0, 0x0, 0x878480, 0xc000099470)
	/usr/local/go/src/html/template/template.go:119 +0x2f
main.indexHandler(0x87dd20, 0xc0000fa2a0, 0xc000064100)
	/go/src/golang-demo/main.go:33 +0xbf
net/http.HandlerFunc.ServeHTTP(0x80c430, 0x87dd20, 0xc0000fa2a0, 0xc000064100)
	/usr/local/go/src/net/http/server.go:2012 +0x44
net/http.(*ServeMux).ServeHTTP(0xafc560, 0x87dd20, 0xc0000fa2a0, 0xc000064100)
	/usr/local/go/src/net/http/server.go:2387 +0x1a5
net/http.serverHandler.ServeHTTP(0xc0000fa000, 0x87dd20, 0xc0000fa2a0, 0xc000064100)
	/usr/local/go/src/net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc000058000, 0x87e6a0, 0xc000062080)
	/usr/local/go/src/net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2933 +0x35c
2020/03/20 19:01:26 http: panic serving 172.17.0.1:52012: runtime error: invalid memory address or nil pointer dereference
goroutine 6 [running]:
net/http.(*conn).serve.func1(0xc0000580a0)
	/usr/local/go/src/net/http/server.go:1772 +0x139
panic(0x78a1a0, 0xaec540)
	/usr/local/go/src/runtime/panic.go:973 +0x3e3
html/template.(*Template).escape(0x0, 0x0, 0x0)
	/usr/local/go/src/html/template/template.go:95 +0x3b
html/template.(*Template).Execute(0x0, 0x878340, 0xc000078000, 0x0, 0x0, 0x878480, 0xc000012270)
	/usr/local/go/src/html/template/template.go:119 +0x2f
main.indexHandler(0x87dd20, 0xc000078000, 0xc000064000)
	/go/src/golang-demo/main.go:33 +0xbf
net/http.HandlerFunc.ServeHTTP(0x80c430, 0x87dd20, 0xc000078000, 0xc000064000)
	/usr/local/go/src/net/http/server.go:2012 +0x44
net/http.(*ServeMux).ServeHTTP(0xafc560, 0x87dd20, 0xc000078000, 0xc000064000)
	/usr/local/go/src/net/http/server.go:2387 +0x1a5
net/http.serverHandler.ServeHTTP(0xc0000fa000, 0x87dd20, 0xc000078000, 0xc000064000)
	/usr/local/go/src/net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc0000580a0, 0x87e6a0, 0xc000062000)
	/usr/local/go/src/net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2933 +0x35c
2020/03/20 19:01:26 http: panic serving 172.17.0.1:52016: runtime error: invalid memory address or nil pointer dereference
goroutine 38 [running]:
net/http.(*conn).serve.func1(0xc0000c4fa0)
	/usr/local/go/src/net/http/server.go:1772 +0x139
panic(0x78a1a0, 0xaec540)
	/usr/local/go/src/runtime/panic.go:973 +0x3e3
html/template.(*Template).escape(0x0, 0x0, 0x0)
	/usr/local/go/src/html/template/template.go:95 +0x3b
html/template.(*Template).Execute(0x0, 0x878340, 0xc0000780e0, 0x0, 0x0, 0x878480, 0xc000012360)
	/usr/local/go/src/html/template/template.go:119 +0x2f
main.indexHandler(0x87dd20, 0xc0000780e0, 0xc00019e100)
	/go/src/golang-demo/main.go:33 +0xbf
net/http.HandlerFunc.ServeHTTP(0x80c430, 0x87dd20, 0xc0000780e0, 0xc00019e100)
	/usr/local/go/src/net/http/server.go:2012 +0x44
net/http.(*ServeMux).ServeHTTP(0xafc560, 0x87dd20, 0xc0000780e0, 0xc00019e100)
	/usr/local/go/src/net/http/server.go:2387 +0x1a5
net/http.serverHandler.ServeHTTP(0xc0000fa000, 0x87dd20, 0xc0000780e0, 0xc00019e100)
	/usr/local/go/src/net/http/server.go:2807 +0xa3
net/http.(*conn).serve(0xc0000c4fa0, 0x87e6a0, 0xc0000dc500)
	/usr/local/go/src/net/http/server.go:1895 +0x86c
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2933 +0x35c

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