Add installation instructions

README.md

@@ -3,7 +3,12 @@
 ### Features
 - Sync files to and from a single S3 bucket.
 - Configure multiple directories to be synced to S3.
-- Currently, the functionality is only provided via running the CLI manually. This works for my use case, but is definitely not ideal.
+- Currently, the functionality is only provided via running the binary manually. This works for my use case, but is definitely not ideal.
+### Installation
+Currently, only installation with `cargo` is supported. This will install the executable to `$HOME/.cargo/bin/s3-sync`.
+```sh
+cargo install --git https://github.com/cloud303-cholden/rs-s3-sync
+```
 ### Example Configuration
 The TOML configuration location must either be `$S3_SYNC_CONFIG` or `$XDG_CONFIG_HOME/s3-sync/config.toml`. Below is a sample configuration file.
 ```toml
@@ -25,5 +30,6 @@ profile = "aws-profile"     # AWS profile name. If not specified, AWS credential
 - The decision to either download or upload is done by comparing the last modified date of a file both locally and in S3. This is very quick to check, but a more robust implementation might also compare the file hashes.
 - Need logic for handling deletion of files both locally and in S3. One example scenario is whether deleting a file locally should prevent it from being downloaded when the next sync is run.
 - Add difference calculation.
-- Add a service for automatically watching for file changes.
+- Add a service for automatically watching for file changes. Move core logic to library.
+- Change the binary to an actual CLI.
 - Add support for changing configuration settings with CLI.