docs(readme): consolidate build and execution sections and update HTTPS clone URL

- Add HTTPS clone URL for git.davo.co
- Document hardened build flags and optimization features
- Combine Build and Execution instructions into a single workflow section

1 files changed, 33 insertions, 2 deletions

diff --git a/README.md b/README.md
index 4245de1..e7c14dd 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,8 @@ A clean, minimalist, robust C utility designed to automate Debian-based Linux sy
 - **Automated APT Maintenance:** Updates repository indices, checks for upgradeable packages, and runs `apt full-upgrade` only when updates exist.
 - **Dependency & Cache Cleanup:** Automatically purges unused dependencies and lingering configuration files (`apt autoremove --purge`) and empties cached installer packages (`apt clean`).
 - **User Cache Housekeeping:** Safely cleans desktop thumbnail caches and user screenshot directories without failing if the directories are empty.
-- **Robust POSIX C Implementation:** Built using strict standard C (`-std=c11`, POSIX 2008) with explicit bounds checking on formatted buffers and process status checking (`WIFEXITED`, `WEXITSTATUS`).
+- **Robust POSIX C Implementation:** Built using strict standard C (`-std=c11`, POSIX 2008) with explicit bounds checking on formatted buffers and POSIX exit status inspection (`WIFEXITED`, `WEXITSTATUS`).
+- **Hardened & Optimized Build:** Compiled with `-O3`, `-flto`, `-march=native`, stack protection (`-fstack-protector-strong`), runtime buffer fortification (`-D_FORTIFY_SOURCE=2`), and strict warning checks (`-Wall -Wextra -Wpedantic -Werror`).
 - **Clean Terminal Output:** Indents subprocess output using `sed` for a clear, readable terminal log.
 
 ---
@@ -24,14 +25,44 @@ This utility requires a **Debian-based distribution** (Debian, Ubuntu, Linux Min
 
 ---
 
+## Repository Access & Cloning
+
+Clone the repository directly from the cgit web frontend:
+
+```bash
+git clone [https://git.davo.co/ud.git](https://git.davo.co/ud.git)
+```
+
+---
+
 ## Build Instructions
 
 To compile the executable using `make`:
 
 ```bash
-# Build the utility (uses gcc with -Wall -Wextra -Wpedantic -O2 -std=c11)
+# Build the utility with maximum optimization and hardening flags
 make
 
+# Install the binary to ~/.local/bin
+make install
+
 # Clean build artifacts
 make clean
+
+# Uninstall the binary from ~/.local/bin
+make uninstall
+```
+
+---
+
+## Execution Instructions
+
+Run the utility directly from your terminal:
+
+```bash
+# Run directly from the source directory
+./ud
+
+# Or run from anywhere if ~/.local/bin is in your $PATH
+ud
 ```