Refactor build steps

build/go/Dockerfile

@@ -1,19 +1,42 @@
-FROM golang:1.13.6
+# [ Stage 1]  Builder
+FROM golang:alpine AS builder
+
+# Set necessary environmet variables needed for our image
+ENV GO111MODULE=on \
+    CGO_ENABLED=0 \
+    GOOS=linux \
+    GOARCH=amd64
+
+
+WORKDIR /app
+COPY ./app/t2-stats /app
+
+# Copy and download dependency using go mod
+RUN go mod download
+
+
+# # Go Packages
+# RUN go get -u -v \
+#     # GUID Generator
+#     github.com/rs/xid \
+#     # PostgreSQL Driver
+#     github.com/jackc/pgx \
+#     github.com/jmoiron/sqlx \
+#     # Better Error Handling
+#     github.com/pkg/errors
+
+RUN go build -o main .
+
+
+# [ Stage 2]
+
+FROM golang:alpine
 
 LABEL maintainer="Anthony Mineo <anthonymineo@gmail.com>"
 
 WORKDIR /app
 
-# Go Packages
-RUN go get -u -v \
-    # GUID Generator
-    github.com/rs/xid \
-    # PostgreSQL Driver
-    github.com/jackc/pgx \
-    github.com/jmoiron/sqlx \
-    # Better Error Handling
-    github.com/pkg/errors
+COPY --from=builder /app/main /app/main
+COPY ./app/t2-stats/start.sh /app/start.sh
 
-COPY ./app/t2-stats /app
-
-ENTRYPOINT go run main.go
+ENTRYPOINT ./start.sh