add dockerfile to pows_server

pow_server/.gitignore

@@ -0,0 +1,2 @@
+go.sum
+main

pow_server/Dockerfile

@@ -0,0 +1,23 @@
+# Start from the latest golang base image
+FROM golang:latest
+
+# Set the Current Working Directory inside the container
+WORKDIR /app
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
+RUN go mod download
+
+# Copy the source from the current directory to the Working Directory inside the container
+COPY . .
+
+# Build the Go app
+RUN go build -o main .
+
+# Expose port 8080 to the outside world
+EXPOSE 8080
+
+# Command to run the executable
+CMD ["./main"]

pow_server/main.go

@@ -80,5 +80,5 @@ func handlePOW(w http.ResponseWriter, r *http.Request) {
 func main() {
 	http.HandleFunc("/powgen", handlePOW)
 
-	log.Fatal(http.ListenAndServe("127.0.0.1:8080", nil))
+	log.Fatal(http.ListenAndServe("0.0.0.0:8080", nil))
 }