root: generate API Client in dockerfile instead of copying it (#942)

* root: generate API Client in dockerfile instead of copying it

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* outpost: fix docker build

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* root: fix path for docker build

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* outpost: set explicit buildContext

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

outpost/proxy.Dockerfile

@@ -1,16 +1,34 @@
+# Stage 1: Generate API Client
+FROM openapitools/openapi-generator-cli as api-builder
+
+COPY ./schema.yml /local/schema.yml
+
+RUN	docker-entrypoint.sh generate \
+    --git-host goauthentik.io \
+    --git-repo-id outpost \
+    --git-user-id api \
+    -i /local/schema.yml \
+    -g go \
+    -o /local/outpost/api \
+    --additional-properties=packageName=api,enumClassPrefix=true,useOneOfDiscriminatorLookup=true && \
+    rm -f /local/outpost/api/go.mod /local/outpost/api/go.sum
+
+# Stage 2: Build
 FROM golang:1.16.4 AS builder
 ARG GIT_BUILD_HASH
 ENV GIT_BUILD_HASH=$GIT_BUILD_HASH
 
-WORKDIR /work
+WORKDIR /go/src/goauthentik.io/outpost
 
-COPY . .
+COPY ./outpost .
+COPY --from=api-builder /local/outpost/api api
 
-RUN go build -o /work/proxy ./cmd/proxy
+RUN go build -o /go/proxy ./cmd/proxy
 
+# Stage 3: Run
 FROM gcr.io/distroless/base-debian10:debug
 
-COPY --from=builder /work/proxy /
+COPY --from=builder /go/proxy /
 
 HEALTHCHECK CMD [ "wget", "--spider", "http://localhost:4180/akprox/ping" ]