Looking at current technological trends and rise of JavaScript, you cannot go wrong with JavaScript.

• There's an abundance of libraries to get most things done
• You can use JavaScript for both the frontend and the backend - this allows you potentially share your logic/models/code across both stacks
• A dynamic/interpreted language such as JavaScript is great for serverless (there's somewhat of a trend towards serverless aswell - especially in modern projects)
• If you like/need static typing, you can always migrate seemlessly to Typescript
• VueJS is a lightweight framework (compared to Angular), it has more GitHub stars and most would argue it's easier to work with (beginner friendly). Additionally most modern webapps do not use JQuery anymore (even though a lot of legacy projects continue to do so). You don't need JQuery if you use Vue/Angular/React

Additionally it doesn't seem like performance is a hugely important metric in your scenario, so JavaScript would suffice.

Note: These are all my opinions and what I've seen in the current market when recently searching for jobs.