use go.mod file and simplify dockerfile

web/.gitignore

@@ -0,0 +1 @@
+.env

web/Dockerfile

@@ -2,19 +2,12 @@ FROM golang:1.15.4-alpine as builder
 
 ENV GOPATH=/build
 ENV GOBIN=/usr/local/go/bin
-ENV GO111MODULE=on
 
 WORKDIR $GOPATH/src
 COPY . .
 
 ARG BRANCH=HEAD
-RUN go mod init cfc_chat_relay\
-    && go get github.com/gorilla/websocket@$BRANCH \
-    && go get github.com/bwmarrin/discordgo@$BRANCH \
-    && go get github.com/getsentry/sentry-go@$BRANCH \
-	&& go list -m all \
-	&& go fmt \
-	&& CGO_ENABLED=0 GOOS=linux go build -a -o cfc_chat_relay . \
+RUN CGO_ENABLED=0 GOOS=linux go build -a -o cfc_chat_relay . \
 	&& cp cfc_chat_relay $GOPATH/.
 
 CMD [ "/build/cfc_chat_relay" ]

web/go.mod

@@ -0,0 +1,8 @@
+module github.com/cfc-servers/cfc_chat_transit
+
+go 1.15
+
+require (
+	github.com/bwmarrin/discordgo v0.23.2 // indirect
+	github.com/gorilla/websocket v1.4.2 // indirect
+)

web/go.sum

@@ -0,0 +1,7 @@
+github.com/bwmarrin/discordgo v0.23.2 h1:BzrtTktixGHIu9Tt7dEE6diysEF9HWnXeHuoJEt2fH4=
+github.com/bwmarrin/discordgo v0.23.2/go.mod h1:c1WtWUGN6nREDmzIpyTp/iD3VYt4Fpx+bVyfBG7JE+M=
+github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16 h1:y6ce7gCWtnH+m3dCjzQ1PCuwl28DDIc3VNnvY29DlIA=
+golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=