fix dockerfile version and deps

Signed-off-by: Alexandre MARRE <me@itsalex.fr>

Dockerfile

@@ -1,9 +1,12 @@
 FROM golang:1.10-alpine3.7 AS downloader
+ARG VERSION
 
 RUN apk add --no-cache git gcc musl-dev
 
 WORKDIR /go/src/github.com/golang-migrate/migrate
 
+ENV DEPS="postgres mysql redshift cassandra spanner cockroachdb clickhouse file go-bindata github aws-s3 google-cloud-storage"
+
 COPY *.go ./
 COPY cli ./cli
 COPY database ./database
@@ -12,7 +15,7 @@ COPY source ./source
 RUN go get -v ./... && \
     go get -u github.com/fsouza/fake-gcs-server/fakestorage && \
     go get -u github.com/kshvakov/clickhouse && \
-    GOOS=linux GOARCH=386 go build -a -o build/migrate.linux-386 -ldflags='-X main.Version=$(VERSION)' -tags '$(DATABASE) $(SOURCE)' ./cli
+    go build -a -o build/migrate.linux-386 -ldflags="-X main.Version=${VERSION}" -tags "$DEPS" ./cli
 
 FROM alpine:3.7
 

docker-deploy.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 
 echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin && \
-docker build . -t migrate/migrate:"$TRAVIS_TAG" && \
+docker build --build-arg VERSION="$TRAVIS_TAG" . -t migrate/migrate:"$TRAVIS_TAG" && \
 docker push migrate/migrate:"$TRAVIS_TAG"