Add docker build

Dockerfile

@@ -0,0 +1,61 @@
+# Build stage
+FROM golang:1.14.2-alpine3.11 as builder
+LABEL maintainer="Khanh Ngo <k@ndk.name"
+ARG BUILD_DEPENDENCIES="npm \
+    yarn"
+
+# Get dependencies
+RUN apk add --update --no-cache ${BUILD_DEPENDENCIES}
+
+WORKDIR /build
+
+# Add sources
+COPY . /build
+
+# Get application dependencies and build
+RUN go mod download
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o wg-ui .
+
+# Prepare assets
+RUN yarn install --pure-lockfile --production && \
+    yarn cache clean
+
+# Move plugin assets
+RUN mkdir -p /assets/plugins && \
+    cp -r /build/node_modules/admin-lte/plugins/jquery/ \
+    /build/node_modules/admin-lte/plugins/fontawesome-free/ \
+    /build/node_modules/admin-lte/plugins/bootstrap/ \
+    /build/node_modules/admin-lte/plugins/icheck-bootstrap/ \
+    /build/node_modules/admin-lte/plugins/toastr/ \
+    /build/node_modules/admin-lte/plugins/jquery-validation/ \
+    /build/node_modules/admin-lte/plugins/select2/ \
+    /build/node_modules/jquery-tags-input/ \
+    /assets/plugins/
+
+
+# Release stage
+FROM golang:1.14.2-alpine3.11
+
+RUN addgroup -S wgui && \
+    adduser -S -D -G wgui wgui
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /app
+
+RUN mkdir -p db
+
+# Copy binary files
+COPY --from=builder --chown=wgui:wgui /build/wg-ui /app
+# Copy templates
+COPY --from=builder --chown=wgui:wgui /build/templates /app/templates
+# Copy assets
+COPY --from=builder --chown=wgui:wgui /build/node_modules/admin-lte/dist/js/adminlte.min.js /app/assets/dist/js/adminlte.min.js
+COPY --from=builder --chown=wgui:wgui /build/node_modules/admin-lte/dist/css/adminlte.min.css /app/assets/dist/css/adminlte.min.css
+COPY --from=builder --chown=wgui:wgui /assets/plugins /app/assets/plugins
+
+RUN chmod +x wg-ui
+
+EXPOSE 5000/tcp
+HEALTHCHECK CMD ["wget","--output-document=-","--quiet","--tries=1","http://127.0.0.1:5000/"]
+ENTRYPOINT ["./wg-ui"]