Add dockerfile

Dockerfile

@@ -0,0 +1,14 @@
+FROM golang:alpine AS build
+COPY . /app
+WORKDIR /app
+RUN GOOS=linux go build -o bdm cmd/buchdesmonats/main.go
+
+
+FROM alpine
+WORKDIR /app
+COPY ./static /app/static/
+COPY ./templates /app/templates/
+RUN mkdir /app/covers/
+COPY --from=build /app/bdm /app/bdm
+EXPOSE 9783
+CMD ["./bdm"]

cmd/buchdesmonats/main.go

@@ -129,7 +129,7 @@ func main() {
 		getHTML("COMIC.mkd", w)
 	})
 
-	err := http.ListenAndServe(":1337", nil)
+	err := http.ListenAndServe(":9783", nil)
 	if err != nil {
 		panic(err)
 	}