Upgrade to Go 1.27.3

AGENTS.md

@@ -41,7 +41,7 @@ The Cloud VM runs inside a Firecracker microVM. Docker requires:
 
 8. **E2e tests** use `testcontainers-go` and require Docker + pre-built images. Set `E2E_CHROMIUM_HEADFUL_IMAGE` and `E2E_CHROMIUM_HEADLESS_IMAGE` env vars to point to the correct image tags.
 
-9. **Go version**: The project requires Go 1.26.10 (per `server/go.mod`). The system Go may be older — ensure `/usr/local/go/bin` is on PATH.
+9. **Go version**: The project requires Go 1.27.3 (per `server/go.mod`). The system Go may be older — ensure `/usr/local/go/bin` is on PATH.
 
 10. **Build headful image**: `cd /workspace && DOCKER_BUILDKIT=1 docker build -f images/chromium-headful/Dockerfile -t kernel-headful-test .` — this takes significantly longer than headless (~10 min) due to Xorg dependencies, the window manager, and the WebRTC client build. The headful `run-docker.sh` runs interactively (`-it`); for background use, run with `-d` instead.
 

images/chromium-headful/Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/golang:1.26.10 AS server-builder
+FROM docker.io/golang:1.27.3 AS server-builder
 WORKDIR /workspace/server
 
 # Allow cross-compilation when building with BuildKit platforms

images/chromium-headless/image/Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/golang:1.26.10 AS server-builder
+FROM docker.io/golang:1.27.3 AS server-builder
 WORKDIR /workspace/server
 
 # Allow cross-compilation when building with BuildKit platforms

server/README.md

@@ -6,7 +6,7 @@ A REST API server to start, stop, and download screen recordings.
 
 ### Required Software
 
-- **Go 1.24.3+** - Programming language runtime
+- **Go 1.27.3+** - Programming language runtime
 - **ffmpeg** - Video recording engine
   - macOS: `brew install ffmpeg`
   - Linux: `sudo apt install ffmpeg` or `sudo yum install ffmpeg`

server/go.mod

@@ -1,6 +1,6 @@
 module github.com/kernel/kernel-images/server
 
-go 1.26.10
+go 1.27.3
 
 tool github.com/oapi-codegen/oapi-codegen/v2/cmd/oapi-codegen