scaling ac tests: make the test pass with colima

on darwin. However, I had to use sshfs which is the only filesystem that
supports mounted sockets with the following command:

`colima start --arch aarch64 --vm-type=vz --vz-rosetta --cpu 8 \
  --memory 8 --mount-type sshfs rosetta`

and link the colima socket to `/var/run/docker.sock` as explained in [1]
with:

`sudo ln -sf $HOME/.colima/rosetta/docker.sock /var/run/docker.sock`.

[1]: testcontainers/testcontainers-go#815 (comment)

go-specs-greet/cmd/httpserver/Dockerfile

@@ -0,0 +1,8 @@
+FROM golang:1.21-alpine
+WORKDIR /app
+COPY go.mod ./
+RUN go mod download
+COPY . .
+RUN go build -o svr go-specs-greet/cmd/httpserver/*.go
+EXPOSE 8080
+CMD [ "./svr" ]

go-specs-greet/cmd/httpserver/greeter_server_test.go

@@ -19,7 +19,7 @@ func TestGreeterServer(t *testing.T) {
 	req := testcontainers.ContainerRequest{
 		FromDockerfile: testcontainers.FromDockerfile{
 			Context:       "../../..",
-			Dockerfile:    "./cmd/httpserver/Dockerfile",
+			Dockerfile:    "./go-specs-greet/cmd/httpserver/Dockerfile",
 			PrintBuildLog: true,
 		},
 		ExposedPorts: []string{"8080:8080"},

go-specs-greet/cmd/httpserver/main.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+func main() {
+	handler := http.HandlerFunc(func(writer http.ResponseWriter, _ *http.Request) {
+		fmt.Fprint(writer, "Hello world")
+	})
+	if err := http.ListenAndServe(":8080", handler); err != nil { //nolint:gosec
+		log.Fatal(err)
+	}
+}

go-specs-greet/specifications/greet.go

@@ -15,5 +15,5 @@ func GreetSpecification(tb testing.TB, greeter Greeter) {
 
 	got, err := greeter.Greet()
 	assert.NoError(tb, err)
-	assert.Equal(tb, got, "Hello World")
+	assert.Equal(tb, got, "Hello world")
 }