build(docker): fix COPY cmd

Signed-off-by: Dwi Siswanto <me@dw1.io>

Author: dwisiswant0

Dockerfile

@@ -9,15 +9,18 @@ LABEL repository="https://github.com/kitabisa/teler-proxy"
 LABEL maintainer="dwisiswant0"
 
 WORKDIR /app
-COPY ["go.mod", "${PGO_FILE}", "."]
+COPY ["go.mod", "${PGO_FILE}", "./"]
 RUN go mod download
 
 RUN apk add build-base
 
 COPY . .
-RUN CGO_ENABLED="1" go build \
-	-pgo "${PGO_FILE}" -ldflags "${LDFLAGS}" \
-	-o ./bin/teler-proxy ./cmd/teler-proxy
+ENV CGO_ENABLED=1
+RUN go build \
+		-pgo "${PGO_FILE}" \
+		-ldflags "${LDFLAGS}" \
+		-o ./bin/teler-proxy \
+		./cmd/teler-proxy
 
 FROM alpine:latest