rename env variables

Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:1.21.0
+
+# Creates an app directory to hold your app’s source code
+WORKDIR /app
+
+# Copies everything from your root directory into /app
+COPY . .
+
+# Installs Go dependencies
+RUN go mod download
+
+# Builds your app with optional configuration
+RUN go build 
+
+# Tells Docker which network port your container listens on
+EXPOSE 8080
+
+# Specifies the executable command that runs when the container starts
+CMD [ “/hal” ]
+