My opinion is Ukraine and EU can kick Russia’s ass as long as they ramp up military production. Ukraine’s army tech went from 20+ years old soviet Kalashnikov stockpiles leftovers to domestically produced drones which dominate battlefield. They can and will increase production. The real question is US reckless enough to ease sanctions on Russia or worse start selling military/dual purpose goods. While Ukraine can withstand demoralized and economically crippled Russia. Ukraine will definitely lose if things get somewhat better for Russian economy and politics. What is more scary is what will happen with US-EU relationships. That would literally be US-EU proxy war.

Container update is not Docker’s concern. Docker is proxy between your Container and OS. So if you want keep your container up to date you need external process. Can be achieved with container orchestration tool like Kubernates

If by beneficial you mean profitable, that depends on whether you going to stay in Brazil and Brazils cost of living relative to teacher’s salary vs US one. I’m neither from Brazil nor US nor have an idea about language teacher labor market. But I moved from my home country to other country permanently. What I know for sure when deciding to move, is that you need to know at least 3 things about your country and other one: cost of living, median salary in your job, how much you loose on taxes. AFAIK, taxes especially relevant for US citizens as they are taxed by US even abroad.

Also how easy is to find Portuguese teacher job in US? Maybe stereotypes, but USAers seem to not be particularly interested in foreign languages