[MrFoof]

Been there. Got out. It took 95% burning determination and hard work, and maybe 5% luck.

1) You've identified that what's in your project portfolio isn't impressive. This is fine, as there's lot of people working for Cardboard BoxCo. My recommendation is to create a side-project that you think might be impressive to potential employers. It doesn't have to be a real website. Think of those "Contoso, Inc." examples that Microsoft likes to use. Just create something that you feel demonstrates what you're capable of and could show either on an inexpensive VPS solution ($20 USD/mo) and also could bring in via a laptop for a bit of show-and-tell (I've had plenty of candidates do this).

2) Even if #1 doesn't lead to an immediate job, keep playing. Keep learning. At the very least you can make your life easier in your current situation. Possibly you might be able to raise an eyebrow for at least something of a pay raise. If not, you're learning skills that could prove useful elsewhere. Don't give up, just dig in. Keep aiming your sights higher, never be complacent with what you're capable of. Keep learning. Keep outdoing your best.

3) Network with everyone you know to look for opportunity. I got out of a similar situation to yours via our hardware vendor. His son used to run a fairly impressive IT firm, and one of his old high school buddies had went to work for a startup that they were providing hardware to. Over the years they knew what I was capable of and could be doing better (they had an idea of what I was getting paid), and that startup needed someone who could get things done. That ended up being my ticket out and eventually on to better things.