feat: create backend endpoint (#15)

* build: build a simple cmake project

* chore: add some .gitignore files

* docs: add README

* build: add Makefile with CMake commands

* chore: update .gitignore

* build: follow Conan 2.0 simple CMake project tutorial

* build: use conanfile.py instead of conanfile.txt

* docs: add conan command to README

* build: change c build to c++ build

* build: switch import from zlib to Crow

* docs: update README with correct cmake command

* feat: create hello world application

https://crowcpp.org/master/getting_started/your_first_application/

* docs: update set up instructions

* feat: add success response to endpoint

* docs: changes to readme

* docs: update README.md

---------

Co-authored-by: ni-jessica <[email protected]>
Co-authored-by: stellaljung <[email protected]>

.gitignore

@@ -0,0 +1 @@
+.DS_Store

backend/.gitignore

@@ -0,0 +1,2 @@
+/build
+CMakeUserPresets.json

backend/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.27)
+project(backend)
+
+find_package(Crow REQUIRED)
+
+add_executable(${PROJECT_NAME} src/main.cpp)
+target_link_libraries(${PROJECT_NAME} Crow::Crow)

backend/README.md

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+# Backend
+
+## Configuration
+
+In `/backend`, install conan:
+
+```bash
+brew install conan cmake
+conan install . --output-folder=build --build=missing
+```
+
+Set up the `/build/` folder:
+
+```bash
+mkdir build && cd build
+cmake .. -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Release
+cmake --build .
+```
+
+From `/backend`, start the server:
+
+```bash
+cd build && ./backend
+```

backend/conanfile.py

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+from conan import ConanFile
+
+
+class BackendRecipe(ConanFile):
+    settings = "os", "compiler", "build_type", "arch"
+    generators = "CMakeToolchain", "CMakeDeps"
+
+    def requirements(self):
+        self.requires("crowcpp-crow/1.0+5")
+
+    def build_requirements(self):
+        self.tool_requires("cmake/3.22.6")

backend/src/main.cpp

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+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "crow.h"
+
+int main(void) {
+    // delcare crow application
+    crow::SimpleApp app; 
+
+    // define endpoint at the root directory
+    CROW_ROUTE(app, "/")([](){
+        crow::json::wvalue response;
+        response["status"] = "success";
+        return response;
+    });
+
+    // set the port, set the app to run on multiple threads, and run the app
+    app.port(18080).multithreaded().run();
+}