Feat/optimize image size (#917)

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### Proposed changes

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Based on: #852

apply common best practice for production builds to reduce weight of
produced binaries. This decrease the size significantly from 171MB to
119MB

### Related issues (optional)

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---------

Co-authored-by: Richard Hillmann <[email protected]>

Author: EronWright

CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 
 - Fixed `rbac.extraRules` in Helm chart [#875](https://github.com/pulumi/pulumi-kubernetes-operator/pull/875)
 - New example: pulumi-ts [#843](https://github.com/pulumi/pulumi-kubernetes-operator/pull/843)
+- Use optimized binaries in container images [#852](https://github.com/pulumi/pulumi-kubernetes-operator/pull/852)
 
 ## 2.0.0 (2025-02-18)
 

Dockerfile

@@ -25,7 +25,7 @@ RUN --mount=type=cache,target=${GOCACHE} \
     --mount=type=bind,source=/agent,target=./agent \
     --mount=type=bind,source=/operator,target=./operator \
     CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} \
-    go build -a -o /manager -ldflags="-X github.com/pulumi/pulumi-kubernetes-operator/v2/operator/version.Version=${VERSION}" ./operator/cmd/main.go
+    go build -a -o /manager -ldflags="-w -X github.com/pulumi/pulumi-kubernetes-operator/v2/operator/version.Version=${VERSION}" ./operator/cmd/main.go
 
 # Build the agent.
 FROM --platform=${BUILDPLATFORM} base AS agent-builder
@@ -37,7 +37,7 @@ RUN --mount=type=cache,target=${GOCACHE} \
     --mount=type=cache,target=${GOMODCACHE} \
     --mount=type=bind,source=/agent,target=./agent \
     CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} \
-    go build -a -o /agent -ldflags "-X github.com/pulumi/pulumi-kubernetes-operator/v2/agent/version.Version=${VERSION}" ./agent/main.go
+    go build -a -o /agent -ldflags "-w -X github.com/pulumi/pulumi-kubernetes-operator/v2/agent/version.Version=${VERSION}" ./agent/main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details