vscode: Update devcontainer and build instructions

README.md

@@ -144,8 +144,7 @@ See https://github.com/Evantage-WS/lldap-kubernetes for a LLDAP deployment for K
 
 To compile the project, you'll need:
 
-- nodejs 16: [nodesource nodejs installation guide](https://github.com/nodesource/distributions)
-- curl: `sudo apt install curl`
+- curl and gzip: `sudo apt install curl gzip`
 - Rust/Cargo: [rustup.rs](https://rustup.rs/)
 
 Then you can compile the server (and the migration tool if you want):
@@ -161,7 +160,6 @@ To bring up the server, you'll need to compile the frontend. In addition to
 cargo, you'll need:
 
 - WASM-pack: `cargo install wasm-pack`
-- rollup.js: `npm install rollup`
 
 Then you can build the frontend files with `./app/build.sh` (you'll need to run
 this after every front-end change to update the WASM package served).