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Making vanilla web-fontend (project with lit, web component) secured (discussions with chatGpt)

Query: I wn complete seperate .css/.scss and .html template file for my webcomponent.js like in angular. But with complete security. In lit. Use any js lib like domPurify, etc. But I wan complete safety. How? ChatGPT said: Thought for 16s Totally doable. Here’s a secure Lit setup with fully separate .html + .scss files , sanitized with DOMPurify , and rendered into the Shadow DOM without sacrificing performance. Folder layout src / lib/ safe- html .js components/ app-shell .html app-shell .scss app-shell .js 1) Install deps npm i dompurify npm i -D sass Vite will compile .scss . We’ll import the compiled CSS as text and attach it via adoptedStyleSheets (fast + memory-friendly). 2) app-shell.html (pure template file) Put your Carbon UI Shell markup here (no scripts). Example stub: < cds-header aria-label = "My App" > < cds-header-name prefix = "IBM" >[Platform] </ cds-header-name > < cds-header-glo...
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How to Add Free SSL Certificate from LetsEncrypt via Certbot in your Java Tomcat / Tomee website?

Assumptions:
1. You are using Linux / Debian Server
2. You are using Compute Engine
3. You are using Google Domains
4. Set $JAVA_HOME=<path to your java base directory>
5. Set $CATALINA_BASE=<path to your Tomcat / Tomee base directory>

-------------------------------------------------------------------------------------

Procedure:
2. In selection option, 
    a) My website running on <none of the above>
    b) Operating system using <as per your operating system>, <Debian 10 in my case>
3. Type command sudo apt-get install certbot
4. Type command sudo certbot certonly --standalone
5. Your certificate will be downloaded and installed in /etc/letsencrypt folder

6. Your certificate files are as follows:
/etc/letsencrypt/live/<your domain name>/cert.pem
/etc/letsencrypt/live/<your domain name>/chain.pem
/etc/letsencrypt/live/<your domain name>/fullchain.pem
/etc/letsencrypt/live/<your domain name>/privkey.pem

7. Change permissions of these file if needed as it have default root access only so that Tomcat/ Tomee user can acces them

8. Type command sudo nano $CATALINA_BASE/conf/server.xml

9. Provide following lines in server.xml
<Connector port="443" protocol="org.apache.coyote.http11.Http11NioProtocol"
               maxThreads="150" SSLEnabled="true" >
        <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" />
        <SSLHostConfig>
            <Certificate certificateKeyFile="/etc/letsencrypt/live/<your domain name>/privkey.pem"
                         certificateFile="/etc/letsencrypt/live/<your domain name>/cert.pem"
                         certificateChainFile="/etc/letsencrypt/live/<your domain name>/chain.pem"
                         type="RSA" />
        </SSLHostConfig>
    </Connector>

10.  // restart tomc(at/ee) server
11. Check your working https:// website in your domain name

Work Done

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If you have any doubts, please let me know.

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