Apache2 folders redirect to IPs

Question

I have installed Apache/2.4.56 (Debian), a noip URL and severals LXC containers. I need to access to the web apps inside the LXC containers:

example.com/app1 -> LXC container 1 (with Zend2)
example.com/app2 -> LXC container 2 (with Laravel 5)
example.com/app3 -> LXC container 3 (with Mattermost)
example.com/app4 -> LXC container 4 (with Plex)
example.com/app5 -> LXC container 5 (with Laravel 10)
example.com/app6 -> LXC container 5 (with Psono)
...
example.com/appN -> LXC container N

ip1: 10.0.3.101

ip2: 10.0.3.102

domain_url: http://example.com

1st approach:

<VirtualHost *:80>
    ProxyPreserveHost On
    ProxyPass             "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "http://ip1"
</VirtualHost>

If I enter to example.com/app1 this send me to example.com/auth/index/index (I lost app1, this should be example.com/app1/auth/index/index). The ProxyPassReverse do not work?

2nd approach:

<VirtualHost *:80>
    ProxyPreserveHost On
    ProxyPass             "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "/"
</VirtualHost>

This work great! but I need more LXC containers.

3rd approach:

<VirtualHost *:80>
    ProxyPreserveHost On
    ProxyPass             "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "/"
    ProxyPass             "/app2"       "http://ip2"
    ProxyPassReverse      "/app2"       "http://ip2"
</VirtualHost>

example.com/app1 -> OK

The buttons was wrong, so I made some changes: The original action for the button was action="{{ route('login') }}" and it resolve as domain_url/login so I changed it to action="domain_url/app2/login"> and the result was: example.com/app2 -> welcome page -> example.com/app2/login (login page) -> example.com/app1/app2/login WRONG

4rd approach:

<VirtualHost *:80>
    ProxyPreserveHost On
    ProxyPass             "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "http://ip1"
    ## WITH OUT THIS ##ProxyPassReverse      "/app1"        "/"
    ProxyPass             "/app2"       "http://ip2"
    ProxyPassReverse      "/app2"       "http://ip2"
</VirtualHost>

example.com/app1 -> example.com/auth/index/index WRONG

The buttons was wrong, so I made some changes: The original action for the button was action="{{ route('login') }}" and it resolve as domain_url/login so I changed it to action="domain_url/app2/login"> and the result was: example.com/app2 -> welcome page -> example.com/app2/login (login page) -> ```example.com/app2/# with so many css, js and images lost.

I think I do not have to use ProxyPassReverse "/app1" "/", so I continue that path but always got example.com/app1->example.com/auth/index/index```

This approach were:

<VirtualHost *:80>
    ProxyPreserveHost On
    ProxyPass             "/app1"       "http://ip1"
    ProxyPassReverse      "/app1"       "http://ip1"
    ProxyPass             "/app2"       "http://ip2"
    ProxyPassReverse      "/app2"       "http://ip2"

    ##HERE THE ATTEMPS .. serverfault do not like to spam the same text over and over again xD
</VirtualHost>

The attemps:

Attempt #1

    RewriteEngine On
    RewriteCond %{HTTP_HOST} ^10\.0\.3\.101$
    RewriteRule ^/(.*)$ domain_url/app1/$1 [P,L]
    RewriteCond %{HTTP_HOST} ^10\.0\.3\.102$
    RewriteRule ^/(.*)$ domain_url/app2/$1 [P,L]

Attempt #2

    RewriteEngine On

    RewriteCond %{RESPONSE} ^.*app1.*
    RewriteRule ^/app1/(.*)$ /app1/$1 [P,L]
    
    RewriteCond %{RESPONSE} ^.*app2.*
    RewriteRule ^/app2/(.*)$ /app2/$1 [P,L]

Attempt #3

    RewriteEngine On

    RewriteCond %{REQUEST_URI} ^/app1/
    RewriteRule ^/app1/(.*)$ domain_url/app1/$1 [P,L]
    
    RewriteCond %{REQUEST_URI} ^/app2/
    RewriteRule ^/app2/(.*)$ domain_url/app2/$1 [P,L]

Attempt #4

    ProxyHTMLEnable On
    ProxyHTMLExtended On

    ProxyHTMLURLMap http://ip1 domain_url/app1
    ProxyHTMLURLMap http://ip2 domain_url/app2

Attempt #5

    AddOutputFilterByType SUBSTITUTE text/html
    Substitute "s|http://10\.0\.3\.101|domain_url/app1|n"
    Substitute "s|http://10\.0\.3\.102|domain_url/app2|n"

Attempt #6

    RequestHeader edit Location ^http://10\.0\.3\.101(.*)$ domain_url/app1$1
    RequestHeader edit Location ^http://10\.0\.3\.101(.*)$ domain_url/app2$1

I need more ideas to test, someone can help me? please, any idea is welcome. I really appreciate your help. If this work, then I would like to configure HTTPS :D

P.S.: I prefer not to use ports, it is more formal to use /app1, etc.