helloworld-go: install CA certs

community/samples/serving/helloworld-elixir/Dockerfile

@@ -21,7 +21,7 @@ RUN mix release --env=prod --verbose \
     && mv /opt/release/bin/${APP_NAME} /opt/release/bin/start_server
 
 FROM alpine:latest
-RUN apk update && apk --no-cache --update add bash openssl-dev
+RUN apk update && apk --no-cache --update add bash openssl-dev ca-certificates
 
 RUN addgroup -g 1000 appuser && \
     adduser -S -u 1000 -G appuser appuser

community/samples/serving/helloworld-elixir/README.md

@@ -70,7 +70,7 @@ When asked, if you want to `Fetch and install dependencies? [Yn]` select `y`
 
    # Prepare final layer
    FROM alpine:latest
-   RUN apk update && apk --no-cache --update add bash openssl-dev
+   RUN apk update && apk --no-cache --update add bash openssl-dev ca-certificates
 
    # Add a user so the server will run as a non-root user.
    RUN addgroup -g 1000 appuser && \

docs/install/Knative-with-Gloo.md

@@ -162,6 +162,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -v -o helloworld
 # Use a Docker multi-stage build to create a lean production image.
 # https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
 FROM alpine
+RUN apk add --no-cache ca-certificates
 
 # Copy the binary to the production image from the builder stage.
 COPY --from=builder /go/src/github.com/knative/docs/helloworld/helloworld /helloworld

docs/serving/samples/hello-world/helloworld-go/Dockerfile

@@ -15,6 +15,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -v -o helloworld
 # Use a Docker multi-stage build to create a lean production image.
 # https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
 FROM alpine
+RUN apk add --no-cache ca-certificates
 
 # Copy the binary to the production image from the builder stage.
 COPY --from=builder /go/src/github.com/knative/docs/helloworld/helloworld /helloworld

docs/serving/samples/hello-world/helloworld-go/README.md

@@ -74,6 +74,7 @@ recreate the source files from this folder.
    # Use a Docker multi-stage build to create a lean production image.
    # https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
    FROM alpine
+   RUN apk add --no-cache ca-certificates
 
    # Copy the binary to the production image from the builder stage.
    COPY --from=builder /go/src/github.com/knative/docs/helloworld/helloworld /helloworld