ci(Dockerfile): Added ENV default for ZONEINFO

Dockerfile

@@ -16,14 +16,14 @@ RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o app
 # Moving the binary to the 'final Image' to make it smaller
 FROM alpine:latest
 
-WORKDIR /app
-
-COPY --from=build /go/src/nocturnal/app .
-
 # The time zone database needed by LoadLocation may not be present on all systems, especially 
 # non-Unix systems. LoadLocation looks in the directory or uncompressed zip file named by the 
 # ZONEINFO environment variable, if any, then looks in known installation locations on Unix 
 # systems, and finally looks in $GOROOT/lib/time/zoneinfo.zip.
 ADD https://github.com/golang/go/raw/master/lib/time/zoneinfo.zip /zoneinfo.zip
 
-ENV ZONEINFO /zoneinfo.zip
+ENV ZONEINFO=/zoneinfo.zip
+
+WORKDIR /app
+
+COPY --from=build /go/src/nocturnal/app .