feat(docker): add monolithic memory checks

[Gaitholabi]

No description provided.

[bytestream]

I've made some changes:

• warning rather than error, the system locking up only happens after running docker compose up -d
• reduced 4gb because a t3.small seems to actually have 1.9G of physical RAM..
• check if /proc/meminfo exists rather than looking at the OS

I now shows:

$ bash setup.sh 
 ____                               _   ____       _
/ ___| _   _ _ __  _ __   ___  _ __| |_|  _ \ __ _| |
\___ \| | | | '_ \| '_ \ / _ \| '__| __| |_) / _` | |
 ___) | |_| | |_) | |_) | (_) | |  | |_|  __/ (_| | |
|____/ \__,_| .__/| .__/ \___/|_|   \__|_|   \__,_|_|
            |_|   |_|

##### ##### ##### ##### ##### ##### ##### ##### ##### ##### #####
                         !! WARNING !!                           
##### ##### ##### ##### ##### ##### ##### ##### ##### ##### #####

The system has less than 4GB of total memory (RAM + Swap),
detected 3999999KB. The system may crash if launched with
insufficient memory.

Greater than 4000000KB is recommended.

Press CTRL+C to exit and add more RAM/Swap. Continuing in 15s...

##### ##### ##### ##### ##### ##### ##### ##### ##### ##### #####

^C

WDYT?

[Gaitholabi]

I've made some changes:

• warning rather than error, the system locking up only happens after running docker compose up -d
• reduced 4gb because a t3.small seems to actually have 1.9G of physical RAM..
• check if /proc/meminfo exists rather than looking at the OS

I now shows:

$ bash setup.sh 
 ____                               _   ____       _
/ ___| _   _ _ __  _ __   ___  _ __| |_|  _ \ __ _| |
\___ \| | | | '_ \| '_ \ / _ \| '__| __| |_) / _` | |
 ___) | |_| | |_) | |_) | (_) | |  | |_|  __/ (_| | |
|____/ \__,_| .__/| .__/ \___/|_|   \__|_|   \__,_|_|
            |_|   |_|

##### ##### ##### ##### ##### ##### ##### ##### ##### ##### #####
                         !! WARNING !!                           
##### ##### ##### ##### ##### ##### ##### ##### ##### ##### #####

The system has less than 4GB of total memory (RAM + Swap),
detected 3999999KB. The system may crash if launched with
insufficient memory.

Greater than 4000000KB is recommended.

Press CTRL+C to exit and add more RAM/Swap. Continuing in 15s...

##### ##### ##### ##### ##### ##### ##### ##### ##### ##### #####

^C

WDYT?

Looks reasonable 👍