fix: update docekr file to include env vars and volume

Dockerfile

@@ -1,8 +1,10 @@
 # Build Stage
+
 FROM golang:1.13 AS build-env
 ADD . /src
 RUN cd /src && go build -o wakapi
 
+
 # Final Stage
 
 # When running the application using `docker run`, you can pass environment variables
@@ -20,6 +22,15 @@ RUN cd /src && go build -o wakapi
 FROM debian
 WORKDIR /app
 
+ENV ENV prod
+ENV WAKAPI_DB_TYPE sqlite3
+ENV WAKAPI_DB_USER ''
+ENV WAKAPI_DB_PASSWORD ''
+ENV WAKAPI_DB_HOST ''
+ENV WAKAPI_DB_NAME=/data/wakapi.db
+ENV WAKAPI_DEFAULT_USER_NAME admin
+ENV WAKAPI_DEFAULT_USER_PASSWORD admin
+
 COPY --from=build-env /src/wakapi /app/
 COPY --from=build-env /src/config.ini /app/
 COPY --from=build-env /src/.env.example /app/.env
@@ -32,4 +43,6 @@ ADD migrations /app/migrations
 ADD views /app/views
 ADD wait-for-it.sh .
 
+VOLUME /data
+
 ENTRYPOINT ./wait-for-it.sh