Add Dockerfile

Dockerfile

@@ -0,0 +1,16 @@
+# Build the go application into a binary
+FROM golang:alpine as builder
+WORKDIR /app
+ADD . ./
+RUN CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -installsuffix cgo -o gatus .
+RUN apk --update add ca-certificates
+
+# Run the binary on an empty container
+FROM scratch
+COPY --from=builder /app/gatus .
+COPY --from=builder /app/config.yaml .
+COPY --from=builder /app/static static/
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+ENV PORT 80
+EXPOSE 80
+ENTRYPOINT ["/gatus"]