Fix remarks/issues after review

docs/tutorials/e2e/prerequisites/prerequisites.md

@@ -121,7 +121,7 @@ export https_proxy=http://[username]:[password]@ [proxy-web-or-IP-address]:[port
 
 :::tip
 
-The above URLs then will be passed only if your proxy server is configured to forward the above whitelist of URLs. To ensure your setting is permant, you may want to add the above command in your .bashrc or /etc/environment. Futher you can configure apt to use the proxy by entering the following into the configuration file /etc/apt/apt.conf:
+The above URLs then will be passed only if your proxy server is configured to forward the above whitelist of URLs. To ensure your setting is permant, you may want to add the above command in your .bashrc or /etc/environment. Further you can configure apt to use the proxy by entering the following into the configuration file /etc/apt/apt.conf:
 
 ```bash
 Acquire::https::Proxy "http://[username]:[password]@ [proxy-web-or-IP-address]:[port-number]";
@@ -137,7 +137,7 @@ export NO_PROXY="localhost,127.0.0.1,::1"
 
 #### http (80)
 
-The port http (80) should not be used, but it will, you can apply the above hints just by replacing https by http.
+The port http (80) should not be used, but it will. You can apply the above hints for https (port 443) just by replacing https by http.
 
 #### ssh (22)