Add Makefile for running CI jobs locally.

Makefile

@@ -0,0 +1,35 @@
+SHELL := bash
+.ONESHELL:
+.SHELLFLAGS := -eu -o pipefail -c
+.DELETE_ON_ERROR:
+MAKEFLAGS += --warn-undefined-variables
+MAKEFLAGS += --no-builtin-rules
+OS:=$(shell uname -s)
+
+ifeq ($(origin .RECIPEPREFIX), undefined)
+  $(error This Make does not support .RECIPEPREFIX. Please use GNU Make 4.0 or later)
+endif
+.RECIPEPREFIX = >
+
+.PHONY: help
+help:
+> @grep -h "##" $(MAKEFILE_LIST) | grep -v grep | sed -E 's/^([^:]*): *## */\1:  /'
+
+.PHONY: test
+test: ## Run the rust tests
+> $(MAKE) -C docker/webhook_bridge_development build
+> docker run --rm -i -t --mount type=tmpfs,destination=/tmp -v "$(shell readlink -f .):/source" --workdir=/source --env CARGO_TARGET_DIR=/target -v "webhook-bridge-cargo-registry:/usr/local/cargo/registry" -v "webhook-bridge-rust-target:/target" webhook-bridge-development cargo test
+
+.PHONY: clippy
+clippy: ## Run static analysis of the code.
+> $(MAKE) -C docker/webhook_bridge_development build
+> docker run --rm -i -t --mount type=tmpfs,destination=/tmp -v "$(shell readlink -f .):/source" --workdir=/source --env CARGO_TARGET_DIR=/target -v "webhook-bridge-cargo-registry:/usr/local/cargo/registry" -v "webhook-bridge-rust-target:/target" webhook-bridge-development cargo clippy --no-deps --all-targets --all-features -- -D warnings
+
+.PHONY: format
+format: ## Auto-format source files.
+> $(MAKE) -C docker/webhook_bridge_development build
+> docker run --rm -i -t --mount type=tmpfs,destination=/tmp -v "$(shell readlink -f .):/source" --workdir=/source --env CARGO_TARGET_DIR=/target -v "webhook-bridge-cargo-registry:/usr/local/cargo/registry" -v "webhook-bridge-rust-target:/target" webhook-bridge-development cargo fmt
+
+.PHONY: clean
+clean:
+> $(MAKE) -C docker/webhook_bridge_development clean