Add instructions for deployment in S3 and AWS Lambda

README.md

@@ -23,4 +23,49 @@ pinned: false
 ## Resources
 - [Geodesic Area calculator](https://geographiclib.sourceforge.io/cgi-bin/Planimeter?type=polygon&rhumb=geodesic&radius=6378137&flattening=1%2F298.257223563&input=40.7128%2C+-74.0060%0D%0A34.0522%2C+-118.2437%0D%0A51.5074%2C+0.1278&option=Submit)
 - [Area calculator function in geographiclib-geodesic module's codebase](https://github.com/geographiclib/geographiclib-js/blob/main/geodesic/PolygonArea.js)
-- [Country border data](https://raw.githubusercontent.com/datasets/geo-countries/master/data/countries.geojson)
+- [Country border data](https://raw.githubusercontent.com/datasets/geo-countries/master/data/countries.geojson)
+- [Link to resolve pydantic error on AWS Lambda](https://github.com/pydantic/pydantic/issues/6557#issuecomment-2402571329)
+
+## Deployment (Without CI/CD)
+
+- First of all calm down, take a backseat and relax
+
+### AWS Lambda (Backend)
+
+- AWS Lambda requires all the python packages and the function files, as it doesn't have the packages installed.
+
+- AWS Lambda architecture should have x86 architecture.
+
+- Make a folder lambda_build, put main.py and all the py code files keeping the structure intact (put the /backend folder i.e.)
+
+- Install all the files in requirements.txt (as it should be in a x86 machine).
+
+- To install the files, use `pip install "pydantic==2.0.2" --platform manylinux2014_x86_64 --target=lambda_build --implementation cp --python-version 3.10 --only-binary=:all: --upgrade` for all the libraries, handle the package name and version. (Automate it in CI/CD pipeline)
+
+- Once the package installation is done, time for zipping.
+
+- Go inside the lambda_build folder, select all files/folder, zip, upload it to Lambda function.
+
+- Handle the main python file. If your main file is main.py, your handler should be main.handle (if handle = Mangum(app)), these names are flexible. If main file is lamba_function.py (with lambda_handle = Mangum(app)), then handle is lambda_function.lambda_hanle.
+
+- Add environment files as needed on lambda. A functional url will pop up which should show {"status" : "ok"}
+
+### AWS S3 Bucket (Frontend)
+
+- Make a build file (npm run build)
+- S3 -> my bucket -> Properties -> Static website hosting: Enable it. Set `index.html` as both source and and error doc.
+- Push all the files to your S3 bucket (just the content of build, not the build folder itself)
+- Set the bucket policy as
+`{
+  "Version": "2012-10-17",
+  "Statement": [{
+    "Sid": "PublicReadGetObject",
+    "Effect": "Allow",
+    "Principal": "*",
+    "Action": "s3:GetObject",
+    "Resource": "arn:aws:s3:::my-map-frontend/*"
+  }]
+}`
+- Block all public access (Turn off 'Turn off all public access`)
+- In properties, get a url to the bucket, put it inside the allowed origins of backend (Lambda)
+- That's it.