Remove docker compose from integration tests because of the testcontainers dependency nightmare (#34)

* Remove docker compose from integration tests because of the testcontainers dependency nightmare

test/Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.22-alpine as builder
+
+ARG ARG_VERSION
+ENV VERSION $ARG_VERSION
+
+WORKDIR /app
+COPY . .
+
+FROM builder AS build-test-app
+RUN CGO_ENABLED=0 \
+    go build -ldflags="-s -w" -o whatismyip ./cmd
+
+FROM scratch AS test
+COPY --from=build-test-app /app/whatismyip /usr/bin/
+ENTRYPOINT ["whatismyip"]