feat(gotester): added docker cli

gotester/Dockerfile

@@ -4,6 +4,7 @@ FROM golang:1.25-alpine
 #   bash     - shell scripts in CI steps
 #   bc       - floating-point coverage threshold comparison
 #   curl     - downloading tools (Atlas CLI)
+#   docker-cli - mock e2e tests that spin up containers (e.g. mockchimoney Redis)
 #   git      - Go modules, golangci-lint VCS checks
 #   grep     - GNU grep with -P (PCRE) for extracting coverage thresholds
 #   make     - mock service Makefiles
@@ -12,6 +13,7 @@ RUN apk add --no-cache \
     bash \
     bc \
     curl \
+    docker-cli \
     git \
     grep \
     make \

gotester/README.md

@@ -9,6 +9,7 @@ Pre-built image for running Go unit tests, mock-service tests, and linting in th
 | Go | 1.25 | Compile and test Go code |
 | golangci-lint | 2.5.0 | Lint all Go packages |
 | Atlas CLI | 1.2.0 | Generate database test migrations |
+| Docker CLI | — | Mock e2e tests that spin up containers (e.g. Redis) |
 | PostgreSQL 17 client | 17.x | `pg_isready` to wait for Postgres service containers |
 | GNU grep (PCRE) | — | Extract coverage thresholds with `-oP` |
 | bc | — | Floating-point coverage comparison |
@@ -17,10 +18,11 @@ Pre-built image for running Go unit tests, mock-service tests, and linting in th
 
 ## Replaces
 
-This single image replaces the tool-installation steps in two interledger-app workflow templates:
+This single image replaces the tool-installation steps in three interledger-app workflow templates:
 
 - **`go-test-template.yml`** — `setup-go`, `Install Atlas CLI`, `pg_isready` wait loop
 - **`mock-tester.yml`** — `setup-go`, `golangci-lint-action`, Docker setup
+- **`linting.yml`** — `setup-go`, `golangci-lint-action`
 
 ## Usage