first readme updates

Author: hastmu

README.md

@@ -1,2 +1,33 @@
 # apt-proxy-detect
-Auto detection of apt proxies in the LAN, caching and checking status
+Auto detection of apt proxies in the LAN, caching and checking status of it.
+
+# Why this is needed?
+Spending 2023 time on this topic sound/reads quite strange but up to now
+i struggle with some problem within the solutions i found so far.
+
+Issues:
+* No reliable detect proxies via mDns. (Timeouts, not found)
+* No caching of the found proxies.
+* No check if the found proxy works for the requested target.
+* No longer active maintained (deprecated warnings all over the place)
+
+# How does it look?
+
+Example output:
+```
+dev@dev:~$ apt-proxy-detect.sh 
+Service[ER][apt-cacher-ng proxy on squid-deb-proxy]@http://192.168.0.27:3142 
+Service[OK][Squid deb proxy on squid-deb-proxy]@http://192.168.0.27:8000 
+http://192.168.0.27:8000
+```
+
+or with specific checking (failing):
+```
+dev@dev:~$ apt-proxy-detect.sh github.xyz
+Service[ER][apt-cacher-ng proxy on squid-deb-proxy]@http://192.168.0.27:3142 
+Service[ER][Squid deb proxy on squid-deb-proxy]@http://192.168.0.27:8000 
+```
+
+# How to install?
+
+will follow next days...